25 Watts/Aquarium Glass Submersible Heater (Tank Size 5-10 Gallon)(temperature Range 20~34'c (68&deg;f and 93&deg;f.) / Ac 220~240 V) Easy to attach on aquarium tank wall with 2 suction cups Temperature range: 20~34'C (68~93'F) Automatically adjust the temperature, good for fish in the aquarium Safe and suitable for fresh water aquariums Material: Plastic+ glass, Delivery time: By Airmail: Generally, delivery to USA takes about 12-20 days